const mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/playground', { useNewUrlParser: true, useUnifiedTopology: true })
    .then(() => console.log('数据库连接成功'))
    .catch(err => console.log(err, '数据库连接失败'))

const courseSchema = mongoose.Schema({
    name: String,
    author: String,
    isPublished: Boolean
});

const Course = mongoose.model('Course', courseSchema);

Course.create({
    name: 'JavaScript',
    author: '黑马老师',
    isPublished: false
}, (err, result) => {
    console.log(err);
    console.log(result);
});
